//package com.bdqn.ch05.com.bdqn.comm;
//
//import javax.servlet.*;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//import java.io.PrintWriter;
//
//public class AuthorizationFilter implements Filter {
//
//
//    @Override
//    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
//        HttpServletRequest HttpRequest=(HttpServletRequest)request;
//        HttpServletResponse httpResponse=(HttpServletResponse)response;
//        if (HttpRequest.getSession().getAttribute("loginUser")==null){
//            httpResponse.setContentType("text/html;charset=UTF-8");
//            PrintWriter out=httpResponse.getWriter();
//            out.print("<script>alert('请先进行登录,再进行后续操作!(Filter控制)');location.href='"+HttpRequest.getContextPath()+"/login.jsp';</script>");
//        }else{
//            chain.doFilter(HttpRequest,httpResponse);
//        }
//    }
//
//
//}
